Wulandari, Ina, Hairida Hairida, Rahmat Rasmawan, Eny Enawati, and Rini Muharini. 2023. “Development of Problems for Higher Order Thinking Skill (HOTS) E-Test on Additive Substance Subject Material”. Hydrogen: Jurnal Kependidikan Kimia 11 (5):698-709. https://doi.org/10.33394/hjkk.v11i5.8730.